Mold



hum 16. 1925.

C. D. PETTIS MOLD Filed April 1, 1925 r of the members in closed pos.

Patented June 16, 1925/ CLIFTON D. PETTIS, OF NEW YORK, N. Y.

MOLD.

Original application filed November 3,

. To all whom it may concern:

Be it known that I, CLIFTON D. Pn'rrrs, a citizen of the United States, residing at New York, county of New York, and State of New York, have invented a new and useful Improvement in Molds, of which the following is a full, clear, and exact description.

The present invention relates broadly to molds of the character adapted for the pro duction of metal castings and to improved operating mechanism for opening and 010s ing the mold members. 1

At the present time it is customary in the art to which the present invention relates to construct molds with a plurality of relatively movable members mounted for movement about predetermined axes, with operating mechanism for' moving such mold members to and from closed position. ()rdinaril the form of operating mechanism provided has either been such as to require a. considerable period of time to ellect complete movement of the members, or has been such that an abrupt opening and closing has been accomplished.

I have found that it is desirable to provide mold operating mechanism of such character that the 'memlnrrs operated thereby may be moved positively and quickly from one position to another, the movement being effected under such conditions that locking ion is insured. In certain types of molds, it is necessary to ell'cct a comparatively wide opening move ment of the members so to roiu'pletely clear the castings formed therein. Frequently the molds in which this type of. movement is required are of comparatively small over-all dimensions, thereby limiting the character of the operating mechanism which can be employed.

'lhepresent invention has for certain of its objects the provision of mold operating mechanism of such nature that it will efiect a. positively snwbth movement of the mold members in bot-n; directions, with a possibility of a wide opening movement of the members and a locking of the members in closed position.

In the accompanying drawings there are shown, for purposes of illustration only, one

embodiment of the present invention, it being understood that the drawings do not de- Jfine the limits of my invention. as changes in the construction and operation disclosed therein may be made without departing 1924, Serial No. 747,451. Divided and this application filled April 1, 1925. Serial No. 19,811. I

either from the spirit of the invention or the scope of my broader claims.

In the drawings:

Figure 1 is a side elevational view, largely diagrammatic, illustrating one form of mold and operating mechanism embodying the present invention; and

Figure 2is an end elevation, partly broken away and partly in section, of the structure 05 illustrated in Figure 1.

ln carrying out the present inven imn, there may be provided a suitable mold base 2 having bearing brackets 3 carried thereby for the reception of a longitudinally extend- 'hl ing pivot pin 4.

Cooperating with the pivot pin is a plurality of mold members 5 each preferably having downwardly extending lugs 6 for cooperation with the pivot 4, whereby dur- 7!? ing either opening or closing movement the members will swing about the pivot as an axis. For limiting the relative closing movement of the mold members 5, they may be provided on either one or both ends thereof with stops 7 adapted to cooperate with'a centering projection 8 extending upwardly from the base and conveniently formed integral with the end brackets 3.

-l1ach oi the mold members may convcnicntly comprise a metal box-like frame, as clearly indicated in Figure 2, adapted to receive therein matrix forming members 9 of any desired construction and contour, de-

pending upon the character of the casting O0 to be formed. The outer wall of each of the mold members is provided with a pair of integrul fork shaped projections arranged ad invent the ends of the mold members and havin" u wr and lower arms 10 the inner parallel faces of which are adapted to be engaged by a pair of circular cams or eccentries 11. These cams or eccentrics are mounted on arms 12 pivotally connected by pivot pins 1;) to lugs 14 that project upwardly from the outer side edges of the base 2. Preferably, the arms 12 constitute the. end members of a bail having a horizontal member 1!, the member 15, the eccentric 11 and the arms 12 all being preferably cast'105 of the bail arms 12. The horizontal member 15 of each hail may be provided with a central socket 16 in which is fixed a handle 17 for swinging: the cams upon the pivot pins 13. ()hvioiisly, as the cams are rocked upon the pivot pins they will cooperate with the upper arms ll of the lIlOlllIllGllb hers to move the letter to closed position, and with the lower 1 rms ll) to open the mold members. As the cams are swung to olose the mold members, they move toward 2!: dead center position vertically above their pivots so that they serve not only to open and close the mold, hiit'elso to loci; it in closed position. Preferably, shown in Figure 2, the arrangement is such that when in closed position the cams will not quite have reached theirdead centerposition, and therefore can be employed to force the meet ing faces of the mold members into som engagement, take up weer between the con tact surfaces of the operating parts and also look the mold members in closed posh lion.

I have found that in actual prevtioe further desirable results are obtained 03 providing spaced operating rams for eeeh of the mold members, whereby at least a duel point of contact with each of the mem hers is insured, thereby preventing any spring or undesirable spreading of the parts such as would result in the produetion of imperfect castings by reason of the formation of fins, or the like, thereon. 1* re quently, it is desirable to open the mold .me'mbers to an extent greater than that which would ordinarily be permitted by the diameter of the earns 11, and in order to overcome this limitation and avoid undue spacing ofthe arms 10, the pivotal axes'of t e cems formed by the pins 13 are prefer ably located outside of the peripheries of the cams,'where' by a moeh greater opening movement ismade possible than can be bl l-ained where the axes are located within the peripheries of the cams, This operation not only permits easy removal of 'a casting but also nilerds ready access to the matrix forming surfaees for cleaning end'eoeting thereof, as may be req'uired, as well permitting the insertion of cores.

The gradual curvature of the cams (ooperates with the arms 10, nol only to produce a positive movement of the mold members but also to reduce a smooth gradual movement thereo the speed of which may be varied, directly in a cordance with the speed at which the handles 17 are opornled, without any danger of sudden jars or abrupt movements of the members.

The present application my impending application Serial No. 48], filed November 3, 1924,

The advantages of the present invention arise from the provision oi eccentric operatit division of ing means whereby mold members may be smoothly and positively xiii-veil to the (lifter ent positions required.

Furl her edvantoges nation of a plurality o7. mini-q for each of lllGjHOlii mer s, as sell as ii'om the posi- Honing of lit-re pivotal axes 25" the (reins outside of the can! peripheries I claim 1. lo e rnslin ineniher, and 11 (em for own said lllill'h her, snid'oen'i having i iivrnaiooh side of the periphery ll\lfil)f, substantially as ieserihed.

2. in a casting mold, nniemher, and a rem for i her, said so i hnvit oi the perip r L from the utilij jzzzoaizhle lilillll movable mold outside eiieetive deserihed,

in o, existing ins-lei or mold IHQHMXS :1, e pierellity :d on said v cl members, 7 d means to open 16 in lhlfiO'l'S, and at stop hunting-ill (:5: log-mo hers for properly 91 1 i closed position, so i ras described.

4 in; e permanent costing mold, the eombinetion of a, base, e l'iorislonlslpivot pin thereon, a plurality of mold memoers imv ing depending lugs enggsgin said )ivot pin to swing to and fro ver .4 ll closed position, rookie hex-vin llrilZi-fil'fii-l axes 'moin'ited on wine hose outs sold Arlene hers, eccentric-en and means on said iiiemba, coins, sill stnntielly es dose 5. In a permenentesetingg' moid the comlaineiion of i base, 2 plurality of mold members pivotally moon-ted on. said base and having outwardly woj'ixfzting logs, rock arms on sold boss, min eeeentrio coins on said arms engaging said or opening and closing seid memhers, :stamtialiy as described,

6, In A Bern lli'ii. er nag; mold, the eon] hinetion oi e. e plurality of mold mom" hers pivotnlly mounted on: mid base end having outwardly projecting logs, rock arms on said hase, end eeeentrieeams' on said arms engaging, said legs for opening and elosing said members, the pivotal eves of rock arms lying outside the periphcries of said cams, substantially described. 7, Mold operating means, 'm-mprising spared-cams, pivotal mountings for said reins, amid a common riot-eating means for a plurality of speceii reins, the pivotal inoim iiiggs for said (Poms loein outside of the peripheries thereof, substantially as de-- scribed.

In a. mold, a move-hie mold member; operating means therefor coiriprising sleek-- memhers in maid mem- I lie m me ing cam having its rocking axis outsideof ibe periphery of .aaid cam, and operating means for said cam, substantially described.

9. In a mold, relativelv movable mold members, a pair of spaced lugs projecting outwardly from each of said members a cam positioned between said lugs, a, pivotal mounting for said cam, and operating means for said cam, the pivoial mourning for said ram being outside of the periphery thereof, substantially as deqcribed,

l0. In a casting mold, a base. a mold member movably carried thereby, a second mold member with which the movable mold member cooperates, a 0am for op rating said movable member. said ram being: dimensioned and mounted as to exert a pinclh in notion between ihe mold members at al times when in closed position, and effective for locking said movable member against accidental opening movement, substaniially as described.

11. In a casting mold, a base, a plurality of mold members movably carried thereby, a cam for operating each of said members, said cams being so dimensioned and mounted as to exert a pinching: artion on the mold members at all times when in losed position to lock said mombvis against arc-idmital opening movement, and imam; for opt-ruff ing any one of said came independently of the others, substantially as described.

Tn testimony whore-of 1 have hereunto set my hand.

CLIFTON D PETIIS. 

